Really depends on what you are doing? A fulfillment center will charge you for everything; printing, labeling, stuffing/sorting, delivery to post office. It gets very pricey. You can do it yourself? Or hire Kids to do it. It really depends, bulk mail is very very confusing. I have taken many classes that have left my head spinning. You need alot if mail to take advantage of it. For best rates you need 250 pieces, traveling to the same 5 digit zip. If you don't have that many then you can do 3 digit but the rates are more. You will have to buy permits etc. But it will be cheaper than hiring a fulfillment center If you are doing mass mail you may be able to find a place to co mingle it? Really depends. If you are looking to farm areas, there is a relatively new way to mail for .147 ( I may be off) but it's close, def in the .14 cent range. It absolutely the cheapest way to mail but there are restrictions. It's through the usps, you print the piece, fill out the paperwork, drop them off. That's it. The mail gets delivered via walk sequence, so you need to be able to farm every home/ business in an area.